Models are based off of our existing products and might not conform to our instructions. Building interiors, bricks used, parts counts and colors may vary from what you see in the instructions for the model. Models come with downloadable instructions for the related item, although the instructions may not match up with the model you are getting. Instructions will always show you how to build the 'official' model. We only use new parts for our models, unless new ones aren't available. If you're interested in the building experience, check out our kits.